A mirror of Mastodon (hosted on github)
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Nick Schonning ed570050c6
Autofix Rails/EagerEvaluationLogMessage (#23429)
11 hours ago
.circleci Update circleci (#21880) 2 months ago
.devcontainer Install SSH server into devcontainer image (#22679) 1 month ago
.github Skip locales linting (#23352) 6 days ago
app Autofix Rails/EagerEvaluationLogMessage (#23429) 11 hours ago
bin Update Mastodon to Rails 6.1 (#15910) 2 years ago
chart helm: cleanup helm chart, now in mastodon/chart (#21801) 2 months ago
config New Crowdin updates (#23393) 20 hours ago
db Fix situations in which instance actor can be set to a Mastodon-incompatible name (#22307) 3 weeks ago
dist Fix nginx location matching (#20198) 3 months ago
lib Bump version to 4.1.0rc3 (#23384) 4 days ago
public Expand Stylelint glob to include CSS files (#22469) 1 month ago
spec Autofix Rails/EagerEvaluationLogMessage (#23429) 11 hours ago
streaming Add metrics endpoint to streaming API (#23388) 4 days ago
.browserslistrc Add ES6 compatibility to browserslist (#18519) 9 months ago
.codeclimate.yml Replace from Code Climate to Super-Linter (#18587) 8 months ago
.deepsource.toml Update .deepsource.toml (#15753) 2 years ago
.dockerignore Update .dockerignore/.gitignore for #16947 etc (#17099) 1 year ago
.env.production.sample fix: remove SMTP_SERVER (#21342) 2 months ago
.eslintrc.js Enable ESLint jsx-a11y/recommended ruleset (#23309) 1 week ago
.gitignore helm: cleanup helm chart, now in mastodon/chart (#21801) 2 months ago
.nvmrc Align everything to Node.js 16 (#22223) 2 months ago
.prettierignore helm: cleanup helm chart, now in mastodon/chart (#21801) 2 months ago
.prettierrc.js Format JSON and YAML using Prettier (#17823) 11 months ago
.rubocop.yml Run Prettier on YML files (#22345) 2 months ago
.ruby-gemset Make Mastodon use its own gemset (#17858) 6 months ago
.ruby-version Bump Ruby version from 3.0.3 to 3.0.4 (#18028) 6 months ago
AUTHORS.md Update AUTHORS.md (#20630) 3 months ago
Aptfile Remove packages that are provided by Heroku stacks (#19836) 2 months ago
CHANGELOG.md Bump version to 4.1.0rc3 (#23384) 4 days ago
CODE_OF_CONDUCT.md Change HTTP to HTTPS for links in CODE_OF_CONDUCT (#22465) 2 months ago
CONTRIBUTING.md Note that CircleCI auth may be required to run PR pipelines (#20371) 3 months ago
Dockerfile Add hadolint as Dockerfile linter (#20993) 2 months ago
FEDERATION.md Add FEDERATION.md (#17029) 1 year ago
Gemfile Bump bootsnap from 1.15.0 to 1.16.0 (#23340) 3 days ago
Gemfile.lock Bump bootsnap from 1.15.0 to 1.16.0 (#23340) 3 days ago
README.md Update README.md (#23409) 14 hours ago
SECURITY.md Change e-mail in SECURITY.md (#20384) 3 months ago
Vagrantfile Update Ubuntu, Node versions, dependencies (#22075) 2 months ago
app.json Make enable_starttls configurable by envvars (#20321) 3 months ago
babel.config.js Remove dependency for @babel/plugin-proposal-class-properties (#16155) 2 years ago
crowdin.yml Prevent translations from accidentally becoming completely different from source strings on Crowdin without translators noticing. (#17085) 1 year ago
docker-compose.yml Update docker-compose.yml (#19063) 5 months ago
jest.config.js Bump jest from 27.5.1 to 28.0.3 (#18280) 9 months ago
jsconfig.json Correct prettier calls for YML/JSON (#21832) 2 months ago
package.json Bump jest-environment-jsdom from 29.3.1 to 29.4.1 (#23329) 6 days ago
postcss.config.js Remove object-fit polyfill for the old Microsoft Edge (#22693) 1 month ago
scalingo.json Make enable_starttls configurable by envvars (#20321) 3 months ago
stylelint.config.js Replace from Code Climate to Super-Linter (#18587) 8 months ago
yarn.lock New Crowdin updates (#23356) 3 days ago



GitHub release Build Status Code Climate Crowdin Docker Pulls

Mastodon is a free, open-source social network server based on ActivityPub where users can follow friends and discover new ones. On Mastodon, users can publish anything they want: links, pictures, text, video. All Mastodon servers are interoperable as a federated network (users on one server can seamlessly communicate with users from another one, including non-Mastodon software that implements ActivityPub!)

Click below to learn more in a video:




No vendor lock-in: Fully interoperable with any conforming platform

It doesn't have to be Mastodon; whatever implements ActivityPub is part of the social network! Learn more

Real-time, chronological timeline updates

Updates of people you're following appear in real-time in the UI via WebSockets. There's a firehose view as well!

Media attachments like images and short videos

Upload and view images and WebM/MP4 videos attached to the updates. Videos with no audio track are treated like GIFs; normal videos loop continuously!

Safety and moderation tools

Mastodon includes private posts, locked accounts, phrase filtering, muting, blocking and all sorts of other features, along with a reporting and moderation system. Learn more

OAuth2 and a straightforward REST API

Mastodon acts as an OAuth2 provider, so 3rd party apps can use the REST and Streaming APIs. This results in a rich app ecosystem with a lot of choices!


Tech stack:

  • Ruby on Rails powers the REST API and other web pages
  • React.js and Redux are used for the dynamic parts of the interface
  • Node.js powers the streaming API


  • PostgreSQL 9.5+
  • Redis 4+
  • Ruby 2.7+
  • Node.js 14+

The repository includes deployment configurations for Docker and docker-compose as well as specific platforms like Heroku, Scalingo, and Nanobox. For Helm charts, reference the mastodon/chart repository. The standalone installation guide is available in the documentation.

A Vagrant configuration is included for development purposes. To use it, complete following steps:

  • Install Vagrant and Virtualbox
  • Install the vagrant-hostsupdater plugin: vagrant plugin install vagrant-hostsupdater
  • Run vagrant up
  • Run vagrant ssh -c "cd /vagrant && foreman start"
  • Open http://mastodon.local in your browser


Mastodon is free, open-source software licensed under AGPLv3.

You can open issues for bugs you've found or features you think are missing. You can also submit pull requests to this repository or submit translations using Crowdin. To get started, take a look at CONTRIBUTING.md. If your contributions are accepted into Mastodon, you can request to be paid through our OpenCollective.

IRC channel: #mastodon on irc.libera.chat


Copyright (C) 2016-2022 Eugen Rochko & other Mastodon contributors (see AUTHORS.md)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.